Intel Xeon D-1557 vs Intel Xeon E5-4648 v3 Comparison

Head-to-Head Benchmarks

The recorded data shows a remarkably consistent pattern across every Cinebench iteration: the Intel Xeon D-1557 wins all six head-to-head comparisons, but by a narrow margin in every case. The largest advantage appears in the Cinebench R15 single-core test, where the D-1557 scores 112 against the E5-4648 v3's 109, a 2.8% delta. Every other test lands within a 2.4% to 2.5% range, making this one of the tightest benchmark spreads between two server processors in the database.

Multicore results tell a similar story. In Cinebench R15 multicore, the D-1557 posts 795 versus 776 for the E5-4648 v3, a 2.4% lead. The gap widens by a tenth of a percentage point in Cinebench R20 multicore, where the scores are 3314 and 3234 respectively, again a 2.5% delta. The most demanding workload, Cinebench R23 multicore, shows 7892 for the D-1557 against 7701 for the E5-4648 v3, maintaining that same 2.5% margin. The consistency is striking: regardless of whether the workload scales across 12 cores or stresses a single thread, the D-1557 holds an almost identical proportional advantage.

Single-core performance follows the same trajectory. The R15 single-core test gives the D-1557 its best relative result at 2.8% (112 versus 109), while R20 single-core (467 versus 456) and R23 single-core (1114 versus 1087) both settle at 2.4% and 2.5% respectively. What the data implies is that the D-1557's edge is not workload-dependent in any meaningful way. It is not a case of one chip excelling at multithreaded rendering while the other wins at lightweight tasks. The advantage is uniform, suggesting a fundamental per-clock efficiency difference rather than a cache or memory subsystem quirk.

Looking at the broader benchmark context, the two processors occupy nearly identical positions in the global rankings. Both sit at the 47th percentile among all CPUs in the database. The D-1557's average benchmark score is 2282, while the E5-4648 v3 averages 2227. That difference of 55 points is small enough that the nearest rivals for each chip overlap. The D-1557's closest competitor is the Intel Xeon E5-2629 v3 at 2283 (a 0% delta), followed by the Intel Core i5-10400H at 2303 (-0.9%) and the Intel Core i3-10305 at 2264 (0.8%). The E5-4648 v3, meanwhile, finds its nearest neighbors in the Intel Xeon D-1548 at 2231 (-0.2%), the Intel Core i7-8559U at 2225 (0.1%), and the Intel Core i7-5775C at 2224 (0.1%). The delta percentages here reveal that both processors are firmly embedded in a dense cluster of similarly performing silicon, where a 1% swing can reorder the entire leaderboard.

The Verdict

The benchmark data points to a clear, if narrow, preference for the Intel Xeon D-1557 in raw compute performance. It wins every recorded test against the E5-4648 v3, with deltas ranging from 2.4% to 2.8%. For workloads that are purely CPU-bound and measured by Cinebench scores, the D-1557 is the stronger choice. The margin is not dramatic, but it is consistent across single-core and multicore scenarios alike.

However, the E5-4648 v3 is not without its own arguments. The recorded specifications show it carries a 59.7 GB/s memory bandwidth figure, a quad-channel memory bus, and 40 PCIe Gen 3 lanes. The D-1557, by contrast, lists a dual-channel memory bus and 24 PCIe Gen 3 lanes, with no memory bandwidth figure recorded. For systems that depend heavily on memory throughput or need to drive many PCIe devices, the E5-4648 v3's platform capabilities may outweigh the small compute deficit. The D-1557 also operates at a 45 W TDP against the E5-4648 v3's 105 W TDP, which makes it far more attractive for dense or power-constrained deployments.

The data does not support a universal winner. For compute-dense workloads where power efficiency matters, the D-1557 is the logical pick. For memory-bandwidth-hungry or high-I/O applications, the E5-4648 v3 offers platform features that the D-1557 simply does not record. Both chips sit at the 47th percentile, so neither is a standout in the broader CPU landscape. The choice comes down to what the rest of the system demands.

Architecture Differences

The two processors come from different Intel microarchitectures and manufacturing nodes. The D-1557 is built on Broadwell, specifically the Broadwell-DE generation, using a 14 nm process. The E5-4648 v3 is a Haswell part, part of the Haswell-EP generation, on a 22 nm node. This generational gap explains why the D-1557 achieves comparable or better performance while operating at lower clock speeds: the base clock is 1500 MHz versus 1700 MHz, and the boost clock is 2.10 GHz versus 2.20 GHz. The 14 nm process likely contributes to the D-1557's significantly lower 45 W TDP, against the E5-4648 v3's 105 W.

The transistor counts and die sizes reflect the architectural differences. The D-1557 packs 3,200 million transistors into a 246 mm² die, while the E5-4648 v3 contains 2,600 million transistors on a larger 356 mm² die. The density advantage of the 14 nm node is evident here: more transistors in a smaller physical area, which helps explain the power efficiency gap.

Cache organization also differs notably. Both chips have 64 KB of L1 cache per core and 256 KB of L2 cache per core. The L3 cache, however, is structured differently. The D-1557 allocates 1.5 MB of L3 per core, which for 12 cores implies a distributed layout. The E5-4648 v3 uses a shared 30 MB L3 cache pool. In practice, the per-core L3 allocation on the D-1557 works out to 1.5 MB times 12 cores, or 18 MB total, which is smaller than the E5-4648 v3's 30 MB shared cache. This difference could matter for workloads with large working sets, though the benchmark results do not show a clear advantage for the larger cache.

Memory support diverges as well. The D-1557 supports both DDR3 and DDR4 memory over a dual-channel bus. The E5-4648 v3 supports only DDR4, but over a quad-channel bus with a recorded bandwidth of 59.7 GB/s. The socket types are completely different: the D-1557 uses Intel BGA 1667 (a soldered, embedded form factor), while the E5-4648 v3 uses the socketed Intel Socket 2011-3. This has major implications for system design: the D-1557 is likely found in compact, integrated platforms, whereas the E5-4648 v3 belongs to traditional socketed servers.

PCIe connectivity also favors the E5-4648 v3, which offers 40 Gen 3 lanes against the D-1557's 24. Both support ECC memory and lack integrated graphics. The D-1557 remains in active production, while the E5-4648 v3 is marked end-of-life, a factor that may influence long-term availability.

FAQ

Q: Which processor has the higher base clock speed?

A: The Intel Xeon E5-4648 v3 runs at 1700 MHz base, while the Intel Xeon D-1557 operates at 1500 MHz. Despite the lower base clock, the D-1557 wins every recorded benchmark.

Q: How does the power consumption compare between the two?

A: The D-1557 has a 45 W TDP, while the E5-4648 v3 is rated at 105 W. This makes the D-1557 substantially more power-efficient in the recorded data.

Q: Do both processors support ECC memory?

A: Yes, both the Intel Xeon D-1557 and the Intel Xeon E5-4648 v3 list ECC memory support as a feature.

Q: What is the memory bandwidth difference?

A: The E5-4648 v3 records a 59.7 GB/s memory bandwidth figure with a quad-channel bus. The D-1557 lists a dual-channel bus but no bandwidth number is recorded for it.

Q: Are these processors still in production?

A: The D-1557 is listed as active, while the E5-4648 v3 is marked end-of-life. The D-1557 was released in February 2016, and the E5-4648 v3 in May 2015.

Q: Which chip has more PCIe lanes?

A: The E5-4648 v3 offers 40 Gen 3 lanes, compared to 24 Gen 3 lanes on the D-1557.

Where Each One Wins

The Intel Xeon D-1557 wins in every compute benchmark recorded, but its advantages extend beyond raw scores. Its 45 W TDP makes it the clear choice for deployments where power draw and thermal output are primary constraints. The 14 nm process node and BGA socket suggest it is designed for compact, embedded server platforms where space is at a premium. The dual memory bus support (DDR3 and DDR4) provides flexibility for systems that may already have DDR3 infrastructure in place. It is also the only one of the two still in active production, which matters for new system designs.

The Intel Xeon E5-4648 v3 wins in platform connectivity and memory throughput. Its 59.7 GB/s memory bandwidth and quad-channel bus make it better suited for workloads that stream large amounts of data, such as database operations or high-performance computing tasks where memory bandwidth is the bottleneck. The 40 PCIe Gen 3 lanes allow it to drive more expansion cards, NVMe drives, or network interfaces directly from the CPU. Its 30 MB shared L3 cache is also larger than the D-1557's distributed per-core allocation, which could benefit applications with large shared data sets. The socketed form factor on Socket 2011-3 means it can be replaced or upgraded independently of the motherboard.

Specification Differences

The two processors differ in several key specification fields. The base clocks are 1500 MHz for the D-1557 and 1700 MHz for the E5-4648 v3, while boost clocks are 2.10 GHz and 2.20 GHz respectively. The TDP gap is substantial: 45 W versus 105 W. The D-1557 uses Intel BGA 1667, and the E5-4648 v3 uses Intel Socket 2011-3. The architectures are Broadwell (Broadwell-DE) and Haswell (Haswell-EP), on 14 nm and 22 nm nodes respectively. Transistor counts are 3,200 million versus 2,600 million, and die sizes are 246 mm² versus 356 mm².

L3 cache organization differs: the D-1557 allocates 1.5 MB per core, while the E5-4648 v3 has 30 MB shared. Memory support is DDR3 and DDR4 for the D-1557 versus DDR4 only for the E5-4648 v3. The memory bus is dual-channel for the D-1557 and quad-channel for the E5-4648 v3, which also records a 59.7 GB/s bandwidth figure. PCIe lanes are 24 for the D-1557 and 40 for the E5-4648 v3. The production status is Active for the D-1557 and End-of-life for the E5-4648 v3. Release dates are February 2016 and May 2015. The launch MSRP for the D-1557 is $694, and for the E5-4648 v3 it is $2405.